Earplug or similar article



FIG. 1 is a perspective view of an earplug or similar article showing our new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is another side elevational view thereof;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a bottom plan view thereof. 

The ornamental design for an earplug or similar article, as shown. 